Schedule II — Valuation and Qualifying Accounts

12 Months Ended

Mar. 31, 2018

Valuation and Qualifying Accounts [Abstract]

Schedule II — Valuation and Qualifying Accounts

American Superconductor Corporation

Schedule II — Valuation and Qualifying Accounts

(In thousands)

	Balance, Beginning of Year		Additions	Write-offs		Recoveries and Other Adjustments	Balance, End of Year
Allowance for doubtful accounts receivable:
Fiscal year ended March 31, 2018	$	54	—	—		—	$	54
Fiscal year ended March 31, 2017	$	54	—	—		—	$	54
Fiscal year ended March 31, 2016	$	54	—	—		—	$	54
	Balance, Beginning of Year		Additions	Write-offs		Recoveries and Other Adjustments	Balance, End of Year
Deferred tax asset valuation allowance:
Fiscal year ended March 31, 2018	$	315,092	24,585	(111,991	)	—	$	227,686
Fiscal year ended March 31, 2017	$	301,393	22,580	(8,881	)	—	$	315,092
Fiscal year ended March 31, 2016	$	294,860	9,028	(2,495	)	—	$	301,393